/oi/

/oi/ is a one-time collaboration between /o/ and /i/ used in the Formula 4CC 2015 Winter Series. With the addition of new teams to the racing grid each board was coupled with another board to fit 42 cars in 1 race.

Takumi was the driver for /o/ while Dogcar raced for team /i/.

/oi/ also participated in the Formula 4CC 2015 Summer Series. The drivers were once again Takumi for /o/ and Dogcar for /i/.